#2 Watch for notices posted on the door or in the windows.
#3 Watch for people moving out in the middle of the night around 1st weekend of the month.
#4 If you see a sale sign in the yard, call the agent and ask.
These are probably the easiest ways.
Keller Williams Realty
I would be happy to keep an eye on the property for you and I can let you know as soon as it becomes available. Call me at 817-965-1022 and let me know the address of the property.